The rotating ratchet head has a "keeper ball" in its inner surface. The outer case is two stamped steel pieces. The ratchet mechanism includes a "reversing" button. The actual reversing mechanism on the produced wrench is slightly different than that shown in the patent drawing. Used for the Mossberg No. 350 ratchet. The thin flat appearance of the ratchet was to facilitate it being included in a boxed set along with the sockets, extension bar, universal joint and other accessories.